Process of making waterproof and air-tight fabrics.



UNITED STATES PATENT OFFICE.

WARREN A. DURRIN, OF WOODVILLE, WISCONSIN.

PROCESS OF MAKING WATERPROOF AND AIR-TIGHT FABRICS.

SPECIFICATION forming part of Letters Patent No. 690,250, dated December31, 1901. Application filed April 3,1901. Serial No. 54,205. (N0specimens.)

T0 at whom, it may concern.-

Be it known that I, WARREN A. DURRIN, a citizen of the United States,residing at Woodville, in the county of St. Croix and State ofWisconsin, have invented a new and useful Process of Making Waterproofand Air-Tight Fabrics, of which the followingis a specification.

This invention relates to the art of making waterproof fabrics, and hasfor its object to provide a new and improved process of filling thefabric, so as to render the same waterproof and also air-tight and atthe same time preserve the strength and flexibility of the fabric. It isfurthermore designed to employ a filler made up of such elements as willnot be injurious to'articles of food wrapped or put up in the treatedfabric and 'to reduce to the minimum the liability of the elements becoming separated from the fabric and mingling with the articles wrappedtherein.

With these and other objects in view the present invention firstconsists in providing a filler having as its elements eighty per cent.of china or potters clay to form a'body, eight per cent. of rye-flour asa sizing, and twelve per cent. of wood-pulp as'a bond to effectuallyunite the body and the sizing, to increase the strength and pli abilityof the filler,and to prevent the clay and sizing from cracking when thefiller has become dried. These elements are thoroughly mixed andcombined with water, so as to produce a paste-like filling compound ofthe consistency of paper-hangers paste. The proportion of eachingredient has been givenin its percentage of the volume of the entirefiller.

The cotton, linen, burlap, or other fabric to be treated is taken in acontinuous-web and drawn through the filler compound contained inavat,so as to effectually subject the opposite sides of the fabric tothe paste, which is taken up thereby and enters the pores of the fabric,thereby effectually filling the latter. As the fabric passes from thebath of the filler compound it is passed between a pair of scrapers,which remove the superfluous filler from the opposite surfaces thereof,leaving only such of the fifiihgma terial as has entered the pores andinterstices of the fabric, after which the scraped fabriciscarrifibtlmough a dryingroom or kiln to effectually dry the same andremove all water and dampness from thefabric and the filler containedthTarein. When the treated fabric has become thoroughly5 an;

is unsized, whereby the filler may effectually enter all of the poresand interstices of the interior of the fabric, as well as upon thesurface thereof, and the wax is finally applied as awaterproofing-surface.

The herein-described process of treating 7o fabrics renders the sameboth Waterproof and air-tight, whereby such treated fabrics areespecially adapted for the manufacture of bags for containingfood-stuffs -as, for instance,

sugar,coffee, salt, dried fruits, &c. Moreover, 7 5

being waterproof and air-tight the bags will prevent the contentsthereof from drying and also retain the flavors and essential qualitiesthereof. The elements of the filler and the wax-bath are odorless,tasteless, and harmlessshould they become separated from the fabric andmingled with the contents of the bag.

What is claimed is The herein-described process of making Waterprooffabrics, consisting in subjecting an unsized fabric to a bath of pottersclay, ryeflour and wood-pulp, then drying the filled fabric, and finallysubjecting the same to a waterproof surfacing of melted paraffin- Intestimony that I claim the foregoing as go my own I have hereto affixedmy signature in the presence of two witnesses. V. A. DURRIN.

Witnesses:

J. O. J oHNsoN, A. HANSON.

After passing 60 IJA/

